EP1887650A1 - Mobile communications device with integrated slot antenna - Google Patents

Mobile communications device with integrated slot antenna Download PDF

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Publication number
EP1887650A1
EP1887650A1 EP07112155A EP07112155A EP1887650A1 EP 1887650 A1 EP1887650 A1 EP 1887650A1 EP 07112155 A EP07112155 A EP 07112155A EP 07112155 A EP07112155 A EP 07112155A EP 1887650 A1 EP1887650 A1 EP 1887650A1
Authority
EP
European Patent Office
Prior art keywords
radio module
mobile communication
communication device
antenna
antenna structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07112155A
Other languages
German (de)
French (fr)
Other versions
EP1887650B1 (en
Inventor
Leopold Hellinger
Gerhard Neumann
Paul Peinsipp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG Oesterreich
Original Assignee
Siemens AG Oesterreich
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Filing date
Publication date
Application filed by Siemens AG Oesterreich filed Critical Siemens AG Oesterreich
Publication of EP1887650A1 publication Critical patent/EP1887650A1/en
Application granted granted Critical
Publication of EP1887650B1 publication Critical patent/EP1887650B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/714—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/02—Connectors or connections adapted for particular applications for antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/16—Connectors or connections adapted for particular applications for telephony
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters

Definitions

  • the invention relates to a mobile communication device with a radio module, to which an antenna structure is connected, and with a radio module fastening device for fastening the radio module to a plate-shaped circuit carrier.
  • Mobile communication devices such as mobile devices, smart phones, PDAs or so-called “on-board units” in motor vehicles, use a so-called radio module for line-wireless signal transmission, which is electrically connected via an antenna connection cable to an antenna integrated in the housing of the communication device.
  • the antenna connection cable consists of a coaxial cable, which is connected to the radio module by means of a coaxial connector.
  • a radio module is for example the Siemens radio module MC55 / 56, which has extremely compact dimensions and a very low weight. It is mainly used for the mass production of applications in the consumer sector of mobile communication terminals (www.siemens.com/wm).
  • this tri-band module MC55 / 56 cover all GSM / GPRS networks worldwide and ensure maximum flexibility in the integration of voice and data communication.
  • For mounting the radio module MC55 / 56 on a printed circuit board Often serves a molding made of plastic, which is attached to the circuit board.
  • the antenna connection claimed in the communication device not only a comparatively large volume of construction, but also represents a significant proportion of costs. However, it is endeavored to manufacture mobile communication terminals with the lowest possible production costs and to perform in the dimensions as small and compact as possible.
  • a main aspect of the proposed solution according to the invention is that the antenna structure and the radio module fixing device form a structural unit and that the antenna connection is made by spring contacts, which are formed in a terminal region of the antenna structure.
  • the space requirement for the antenna connection is comparatively low.
  • the electrical connection of the antenna to the radio module takes place simultaneously with the attachment of the radio module to the circuit carrier. This simplifies the assembly considerably. It For example, automated handling systems can be increasingly used, so that the production of the electrical device is possible at a lower cost overall.
  • the spring contacts and the antenna structure are made of one piece, for example of a metal plate or a metal sheet.
  • a preferred embodiment may be characterized in that the antenna structure is formed as a planar slot antenna, that in a connection region of the slot antenna, two tongue-shaped continuations are formed and that the spring contacts are formed from these tongue-shaped continuations.
  • the radio module fastening device is designed as a plastic half-shell, that the antenna structure is arranged on an outer side of the plastic half-shell facing away from the carrier, and the spring contacts are replaced by a, in the assembled state with the contact surfaces of the radio module, engage in the plastic half-shell provided recess.
  • the plastic half-shell can be inexpensively manufactured by injection molding. By attaching the antenna structure to the outside of this plastic part, the antenna is spaced from the radio module; On the other hand, the antenna together with the radio module mounting device forms a structural unit, which facilitates handling during manufacture.
  • each spring contact is formed in each case by a bend of the tongue-shaped continuation facing the radio module.
  • a corrosion-resistant coating can be done for example by a noble metal or a noble metal alloy.
  • the mechanical connection between antenna structure and radio module fastening device can be produced with comparatively little effort by positive locking, for example as a riveted connection.
  • the slot antenna can be made together with spring contacts as a sheet metal bending stamped part.
  • FIG. 1 shows a radio module fastening device 7 which simultaneously serves as a carrier for a GSM antenna 2.
  • the radio module fastening device 7 is made in the present embodiment as a half shell made of plastic.
  • the antenna 2 consists essentially of an electrically conductive antenna structure 3, which is the actual radiator, which serves for the transmission-side output or reception-side recording of electromagnetic waves.
  • the antenna structure 3 is formed in the present example by a flat metallic structure (a thin metal plate).
  • the radiation and the reception of the electromagnetic waves are interrupted in this metal plate.
  • the interruptions are drawn as slots whose slot geometry is indicated by the reference numeral 12.
  • the slot geometry 12 is matched to the carrier frequency used or carrier frequencies of the radio transmission.
  • Reference numeral 14 denotes an antenna connection region.
  • the planar antenna structure 3 is continued in the form of a tongue by two strip conductors. These strip conductors are substantially parallel to each other and form a comparatively short Antenna connection cable 4. They are each bent at the ends. By the bend spring contacts 5 are formed, which engage through a recess 15 in the plastic half-shell 7 through, and - as will be explained in more detail below - each contacting a present on a wireless module 1 contact surface 6.
  • the radio module mounting device 7 and the antenna 2 form a structural unit, that is, the antenna structure 3 is inextricably linked to the plastic half-shell 7. In the drawings of Figures 1 to 3, this permanent connection is represented by six riveted joint 9.
  • connection can also be designed differently, for example by another positive connection or by a cohesive connection, for example by an adhesive connection.
  • the plastic half-shell 7 has in addition to the recess 15 further recesses 16, which favor the heat dissipation from the radio module 1, but are of no significance for the present invention.
  • FIG. 2 shows as an outline the plate-shaped circuit carrier 8 of the communication device.
  • the display corresponds to a state prior to installation of the radio module 1.
  • the radio module 1 is located between the cup-shaped radio module mounting device 7 and the plate-shaped carrier 8.
  • the radio module 1 is the above-mentioned wireless module MC55 / 56 Siemens.
  • the dimensions of this miniaturized radio module are 35 * 32.5 * 2.95 millimeters and with a mass of 5.5 g.
  • the radio module mounting device 7 is lowered in the direction of arrow 11 on the plate-shaped support 8 during assembly.
  • FIG. 3 shows the state after assembly.
  • the two spring contacts 5 are now under elastic bias on the respectively associated contact surfaces 6 of the radio module 1.
  • the antenna 3 is electrically connected to the radio module 1.
  • the applied spring force ensures that this electrical connection is maintained even with vibrations of the mobile communication device.
  • a gold alloy coating ensures that low contact resistance is maintained over a long service life.
  • the mechanical connection between the radio module fastening device 7 and the carrier 9 is produced by a latching connection 10.
  • this latching connection has a latching piece 13 (FIG. 2), which is pushed from an underside of the carrier into a corresponding bore of the carrier and snaps into a corresponding bore of the part 7.
  • the electrical connection of the antenna 2 to the radio module 1 is established and, on the other hand, the radio module 1 is mechanically fixed on the carrier 8. In this mounting position, the radio module 1 attached to the carrier 8 is electrically connected to circuits of the communication device, not shown in detail.
  • the invention thus eliminates a complex and space-consuming wiring between the antenna 2 and the radio module 1. Consequently, the previously required installation space for the coaxial cable and for the coaxial connector is eliminated.
  • the mobile communication device according to the invention builds smaller and has a lower weight.
  • the production of the antenna structure 3 in the form of a slot antenna can be carried out as a sheet metal bending stamped part by means of a series compound tool in mass production with comparatively low production costs.
  • the assembly costs are reduced in the production of the mobile communication device, since for the connection of the antenna 2, the coaxial cable falls away.
  • the handling of the filigree sheet-metal slot antenna 3 is easier, since the radio module mounting device 7 at the same time as a stable support for the Antenna 2 acts.
  • the antenna structure 3 and the radio module fastening device 7 advantageously form a structural unit, which also favors the degree of automation. It can be used to a greater extent automatic handling tools, which is particularly in a production in large quantities of great advantage.
  • the fastening means 10 between the radio module mounting device 7 and the plate-shaped circuit carrier 8 of the communication device be carried out differently, for example, by a non-detachable rivet or snap connection or - if the mobile communication device is used as a so-called "on-board unit" in a motor vehicle, additionally be secured by a screw connection.

Abstract

A mobile communication appliance comprises a RF-module (1) with antenna structure (3), and a RF-module fixture device (7). The antenna structure (3) is joined to the RF module fixture device (7) by a fixture device (9) and in the antenna connection zone (14) are formed spring contacts (5) for fixing the RF module (1) on to the circuit board (8) to provide electrical connection to the pads (6) provided on the RF-module (1).

Description

Technisches GebietTechnical area

Die Erfindung betrifft ein mobiles Kommunikationsgerät mit einem Funkmodul, an welches eine Antennenstruktur angeschlossen ist, und mit einer Funkmodul-Befestigungsvorrichtung, um das Funkmodul auf einem plattenförmigen Schaltungsträger zu befestigen.The invention relates to a mobile communication device with a radio module, to which an antenna structure is connected, and with a radio module fastening device for fastening the radio module to a plate-shaped circuit carrier.

Stand der TechnikState of the art

Mobile Kommunikationsgeräte, wie beispielsweise Mobilfunkgeräte, Smartphones, PDAs oder sog. "on-board-units" in Kraftfahrzeugen, verwenden zur leitungsungebundenen Signalübertragung ein sog. Funkmodul, das über eine Antennenanschlussleitung mit einer im Gehäuse des Kommunikationsgerätes integrierten Antenne elektrisch verbunden ist. Die Antennenanschlussleitung besteht aus einem Koaxialkabel, das mittels eines Koaxial-Steckverbinders an das Funkmodul angesteckt ist. Ein solches Funkmodul ist beispielsweise das Siemens-Funkmodul MC55/56, das äußerst kompakte Abmessungen und ein sehr geringes Gewicht aufweist. Es wird vor allem für die Massenproduktion von Anwendungen im Consumer-Bereich mobiler Kommunikationsendgeräte eingesetzt (www.siemens.com/wm). Verschiedene Varianten dieses Tri-Band-Moduls MC55/56 decken sämtliche GSM/GPRS-Netze weltweit ab und gewährleisten eine größtmögliche Flexibilität bei der Integration von Sprach- und Datenkommunikation. Zur Befestigung des Funkmoduls MC55/56 auf einer Leiterplatte dient häufig ein Formteil aus Kunststoff, das auf der Leiterplatte befestigt ist.Mobile communication devices, such as mobile devices, smart phones, PDAs or so-called "on-board units" in motor vehicles, use a so-called radio module for line-wireless signal transmission, which is electrically connected via an antenna connection cable to an antenna integrated in the housing of the communication device. The antenna connection cable consists of a coaxial cable, which is connected to the radio module by means of a coaxial connector. Such a radio module is for example the Siemens radio module MC55 / 56, which has extremely compact dimensions and a very low weight. It is mainly used for the mass production of applications in the consumer sector of mobile communication terminals (www.siemens.com/wm). Various variants of this tri-band module MC55 / 56 cover all GSM / GPRS networks worldwide and ensure maximum flexibility in the integration of voice and data communication. For mounting the radio module MC55 / 56 on a printed circuit board Often serves a molding made of plastic, which is attached to the circuit board.

Der Antennenanschluss beansprucht im Kommunikationsgerät nicht nur ein vergleichsweise großes Bauvolumen, sondern stellt auch einen erheblichen Kostenanteil dar. Man ist aber bestrebt, mobile Kommunikationsendgeräte mit möglichst geringen Herstellungskosten zu fertigen und in den Abmessungen so klein und kompakt wie möglich auszuführen.The antenna connection claimed in the communication device not only a comparatively large volume of construction, but also represents a significant proportion of costs. However, it is endeavored to manufacture mobile communication terminals with the lowest possible production costs and to perform in the dimensions as small and compact as possible.

Darstellung der ErfindungPresentation of the invention

Es ist eine Aufgabe der vorliegenden Erfindung ein mobiles Kommunikationsgerät anzugeben, das kostengünstig herstellbar ist und das ein möglichst kleines Bauvolumen und ein geringes Gewicht aufweist.It is an object of the present invention to provide a mobile communication device, which is inexpensive to produce and which has the smallest possible volume and a low weight.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand von abhängigen Ansprüchen.This object is solved by the features of patent claim 1. Advantageous embodiments are the subject of dependent claims.

Ein Hauptaspekt der erfindungsgemäß vorgeschlagenen Lösung besteht darin, dass die Antennenstruktur und die Funkmodul-Befestigungsvorrichtung eine bauliche Einheit bilden und dass der Antennenanschluss durch Federkontakte hergestellt ist, die in einem Anschlussbereich der Antennenstruktur ausgebildet sind. Dadurch entfällt ein teurer Koaxial-Antennenanschluss. Der Platzbedarf für den Antennenanschluss ist vergleichsweise gering. Bei der Montage erfolgt der elektrische Anschluss der Antenne an das Funkmodul gleichzeitig mit der Befestigung des Funkmoduls auf dem Schaltungsträger. Dies vereinfacht die Montage erheblich. Es können verstärkt automatische Handhabungssysteme eingesetzt werden, sodass die Herstellung des elektrischen Gerätes insgesamt mit geringeren Kosten möglich ist.A main aspect of the proposed solution according to the invention is that the antenna structure and the radio module fixing device form a structural unit and that the antenna connection is made by spring contacts, which are formed in a terminal region of the antenna structure. This eliminates a costly coaxial antenna connection. The space requirement for the antenna connection is comparatively low. During assembly, the electrical connection of the antenna to the radio module takes place simultaneously with the attachment of the radio module to the circuit carrier. This simplifies the assembly considerably. It For example, automated handling systems can be increasingly used, so that the production of the electrical device is possible at a lower cost overall.

Hinsichtlich geringer Herstellungskosten kann es besonders günstig sein, wenn die Federkontakte und die Antennenstruktur aus einem Stück hergestellt sind, beispielsweise aus einer Metallplatte oder einem Blech.With regard to low manufacturing costs, it can be particularly favorable if the spring contacts and the antenna structure are made of one piece, for example of a metal plate or a metal sheet.

Eine bevorzugte Ausführungsform kann dadurch gekennzeichnet sein, dass die Antennenstruktur als eine planare Schlitzantenne ausgebildet ist, dass in einem Anschlussbereich der Schlitzantenne zwei zungenförmige Fortsetzungen ausgebildet sind und dass die Federkontakte aus diesen zungenförmigen Fortsetzungen geformt sind.A preferred embodiment may be characterized in that the antenna structure is formed as a planar slot antenna, that in a connection region of the slot antenna, two tongue-shaped continuations are formed and that the spring contacts are formed from these tongue-shaped continuations.

In einer bevorzugten Ausführungsform kann vorgesehen sein, dass die Funkmodul-Befestigungsvorrichtung als Kunststoff-Halbschale ausgebildet ist, dass die Antennenstruktur an einer, vom Träger abgewandten Außenseite der Kunststoffhalbschale angeordnet ist und die Federkontakte durch eine, im zusammengebauten Zustand mit den Kontaktflächen des Funkmoduls korrespondierenden, in der Kunststoffhalbschale vorgesehenen Ausnehmung hindurch greifen. Die Kunststoff-Halbschale kann kostengünstig in Spritzgusstechnik hergestellt werden. Durch die Befestigung der Antennenstruktur an der Außenseite dieses Kunststoffteils, ist die Antenne vom Funkmodul beabstandet; anderseits bildet die Antenne zusammen mit der Funkmodul-Befestigungsvorrichtung eine bauliche Einheit, was die Handhabung bei der Fertigung erleichtert.In a preferred embodiment, it can be provided that the radio module fastening device is designed as a plastic half-shell, that the antenna structure is arranged on an outer side of the plastic half-shell facing away from the carrier, and the spring contacts are replaced by a, in the assembled state with the contact surfaces of the radio module, engage in the plastic half-shell provided recess. The plastic half-shell can be inexpensively manufactured by injection molding. By attaching the antenna structure to the outside of this plastic part, the antenna is spaced from the radio module; On the other hand, the antenna together with the radio module mounting device forms a structural unit, which facilitates handling during manufacture.

Unter fertigungstechnischen Gesichtspunkten kann es günstig sein, wenn in einem zusammengebauten Zustand jeder Federkontakt jeweils durch eine zum Funkmodul weisende Abkröpfung der zungenförmigen Fortsetzung gebildet ist.From a manufacturing point of view, it may be favorable if, in an assembled state, each spring contact is formed in each case by a bend of the tongue-shaped continuation facing the radio module.

Um einen möglichst geringen Übergangswiderstand zwischen Federkontakt und Kontaktfläche zu erreichen kann es günstig sein, wenn zumindest die zum Funkmodul weisende Abkröpfung der zungenförmigen Fortsetzung mit einer korrosionsbeständigen Beschichtung beschichtet ist. Eine solche Beschichtung kann beispielsweise durch ein Edelmetall oder eine Edelmetalllegierung erfolgen.In order to achieve the lowest possible contact resistance between spring contact and contact surface, it may be favorable if at least the bending of the tongue-shaped continuation facing the radio module is coated with a corrosion-resistant coating. Such a coating can be done for example by a noble metal or a noble metal alloy.

Die mechanische Verbindung zwischen Antennenstruktur und Funkmodul-Befestigungsvorrichtung lässt sich mit vergleichsweise geringem Aufwand durch Formschluss, beispielsweise als Nietverbindung herstellen.The mechanical connection between antenna structure and radio module fastening device can be produced with comparatively little effort by positive locking, for example as a riveted connection.

Mit geringem Aufwand kann die Schlitzantenne samt Federkontakte als Blech-Biege-Stanzteil gefertigt werden.With little effort, the slot antenna can be made together with spring contacts as a sheet metal bending stamped part.

Kurzbeschreibung der ZeichnungBrief description of the drawing

Zur weiteren Erläuterung der Erfindung wird im nachfolgenden Teil der Beschreibung auf die Zeichnungen Bezug genommen, in denen weitere vorteilhafte Ausgestaltungen, Einzelheiten und Weiterbildungen der Erfindung zu entnehmen sind. Es zeigen:

Figur 1
eine Funkmodul-Befestigungsvorrichtung mit integrierter Antenne;
Figur 2
eine Funkmodul-Befestigungsvorrichtung mit integrierter Antenne vor der Montage auf einem plattenförmigen Träger;
Figur 3
eine Funkmodul-Befestigungsvorrichtung, mittels derer ein Funkmodul auf dem plattenförmigen Träger fixiert ist.
To further explain the invention, reference is made in the following part of the description to the drawings, in which further advantageous embodiments, details and further developments of the invention can be found. Show it:
FIG. 1
a radio module attachment device with integrated antenna;
FIG. 2
a radio module mounting device with integrated antenna prior to mounting on a plate-shaped carrier;
FIG. 3
a radio module fixing device, by means of which a radio module is fixed on the plate-shaped support.

Ausführung der ErfindungEmbodiment of the invention

Die Figur 1 zeigt eine Funkmodul-Befestigungsvorrichtung 7 die gleichzeitig als Träger für eine GSM-Antenne 2 dient. Die Funkmodul-Befestigungsvorrichtung 7 ist im vorliegenden Ausführungsbeispiel als Halbschale aus Kunststoff hergestellt. Die Antenne 2 besteht im Wesentlichen aus einer elektrisch leitenden Antennenstruktur 3, das ist der eigentliche Strahler, der zur sendeseitigen Abgabe bzw. empfangsseitigen Aufnahme elektromagnetischer Wellen dient. Die Antennenstruktur 3 ist im vorliegenden Beispiel durch eine flächige metallische Struktur (einer dünnen Metallplatte) gebildet. Für die Abstrahlung und den Empfang der elektromagnetischen Wellen sorgen Unterbrechungen in dieser Metallplatte. Die Unterbrechungen sind als Schlitze gezeichnet, deren Schlitzgeometrie mit dem Bezugszeichen 12 gekennzeichnet ist. Die Schlitzgeometrie 12 ist auf die verwendete Trägerfrequenz bzw. Trägerfrequenzen der Funkübertragung abgestimmt. Mit dem Bezugszeichen 14 ist ein Antennenanschlussbereich gekennzeichnet. In diesem Antennenanschlussbereich 14 ist die planare Antennenstruktur 3 durch zwei Streifenleiter zungenförmig fortgesetzt. Diese Streifenleiter verlaufen im wesentlichen parallel zueinander und bilden eine vergleichsweise kurze Antennenanschlussleitung 4. Sie sind endseitig jeweils gekröpft. Durch die Abkröpfung werden Federkontakte 5 ausgebildet, die durch eine Ausnehmung 15 in der Kunststoff-Halbschale 7 hindurch greifen, und - wie im Folgenden noch näher erläutert wird -, jeweils eine auf einem Funkmodul 1 vorhandene Kontaktfläche 6 kontaktieren. Die Funkmodul-Befestigungsvorrichtung 7 und die Antenne 2 bilden eine bauliche Einheit, das heißt die Antennenstruktur 3 ist mit der Kunststoff-Halbschale 7 unlösbar verbunden. In den Zeichnungen der Figuren 1 bis 3 ist diese unlösbare Verbindung durch sechs Nietverbindung 9 dargestellt. Selbstverständlich kann diese Verbindung auch anders ausgeführt sein, beispielsweise durch eine andere formschlüssige Verbindung oder durch eine stoffschlüssige Verbindung, z.B. durch eine Klebeverbindung. Die Kunststoff-Halbschale 7 weist neben der Ausnehmung 15 weitere Ausnehmungen 16 auf, welche die Wärmeabfuhr aus dem Funkmodul 1 begünstigen, aber für die vorliegende Erfindung ohne Bedeutung sind.FIG. 1 shows a radio module fastening device 7 which simultaneously serves as a carrier for a GSM antenna 2. The radio module fastening device 7 is made in the present embodiment as a half shell made of plastic. The antenna 2 consists essentially of an electrically conductive antenna structure 3, which is the actual radiator, which serves for the transmission-side output or reception-side recording of electromagnetic waves. The antenna structure 3 is formed in the present example by a flat metallic structure (a thin metal plate). The radiation and the reception of the electromagnetic waves are interrupted in this metal plate. The interruptions are drawn as slots whose slot geometry is indicated by the reference numeral 12. The slot geometry 12 is matched to the carrier frequency used or carrier frequencies of the radio transmission. Reference numeral 14 denotes an antenna connection region. In this antenna connection region 14, the planar antenna structure 3 is continued in the form of a tongue by two strip conductors. These strip conductors are substantially parallel to each other and form a comparatively short Antenna connection cable 4. They are each bent at the ends. By the bend spring contacts 5 are formed, which engage through a recess 15 in the plastic half-shell 7 through, and - as will be explained in more detail below - each contacting a present on a wireless module 1 contact surface 6. The radio module mounting device 7 and the antenna 2 form a structural unit, that is, the antenna structure 3 is inextricably linked to the plastic half-shell 7. In the drawings of Figures 1 to 3, this permanent connection is represented by six riveted joint 9. Of course, this connection can also be designed differently, for example by another positive connection or by a cohesive connection, for example by an adhesive connection. The plastic half-shell 7 has in addition to the recess 15 further recesses 16, which favor the heat dissipation from the radio module 1, but are of no significance for the present invention.

In der auseinander gezogenen Darstellung der Figur 2 ist in einem Ausschnitt ein Teil des mobilen Kommunikationsgerätes dargestellt. Die Figur 2 zeigt als Ausriss den plattenförmigen Schaltungsträger 8 des Kommunikationsgerätes. Die Darstellung entspricht einem Zustand vor der Montage des Funkmoduls 1. Das Funkmodul 1 liegt zwischen der schalenförmigen Funkmodul-Befestigungsvorrichtung 7 und dem plattenförmigen Träger 8. Im dargestellten Ausführungsbeispiel ist das Funkmodul 1 das eingangs erwähnte Wireless Modul MC55/56 der Firma Siemens. Die Abmessungen dieses miniaturisierten Funkmoduls betragen 35 * 32,5 * 2,95 Millimeter und bei einer Masse von 5,5 g.In the exploded view of Figure 2, a portion of the mobile communication device is shown in a section. FIG. 2 shows as an outline the plate-shaped circuit carrier 8 of the communication device. The display corresponds to a state prior to installation of the radio module 1. The radio module 1 is located between the cup-shaped radio module mounting device 7 and the plate-shaped carrier 8. In the illustrated embodiment, the radio module 1 is the above-mentioned wireless module MC55 / 56 Siemens. The dimensions of this miniaturized radio module are 35 * 32.5 * 2.95 millimeters and with a mass of 5.5 g.

Wie in der Explosionsdarstellung der Figur 2 gezeigt, wird während der Montage die Funkmodul-Befestigungsvorrichtung 7 in Richtung des Pfeils 11 auf den plattenförmigen Träger 8 abgesenkt. Dabei kontaktieren die Federkontakte 5, die durch die Ausnehmung 15 hindurch ragen, korrespondierende Kontaktflächen 6, die auf einer Oberseite des Funkmoduls 1 ausgebildet sind.As shown in the exploded view of Figure 2, the radio module mounting device 7 is lowered in the direction of arrow 11 on the plate-shaped support 8 during assembly. In this case, the spring contacts 5, which protrude through the recess 15, contact corresponding contact surfaces 6, which are formed on an upper side of the radio module 1.

Die Figur 3 zeigt den Zustand nach der Montage. Die beiden Federkontakte 5 liegen nun unter elastischer Vorspannung auf den jeweils zugeordneten Kontaktflächen 6 des Funkmoduls 1 auf. Die Antenne 3 ist an das Funkmodul 1 elektrisch angeschlossen. Durch die aufgebrachte Federkraft ist sichergestellt, dass diese elektrische Verbindung auch bei Erschütterungen des mobilen Kommunikationsgerätes aufrechterhalten bleibt. Eine Beschichtung aus einer Goldlegierung stellt sicher, dass ein geringer Übergangswiderstand über eine lange Gebrauchsdauer aufrechterhalten bleibt. Die mechanische Verbindung zwischen der Funkmodul-Befestigungsvorrichtung 7 und dem Träger 9 ist durch eine Rastverbindung 10 hergestellt. Im vorliegenden Ausführungsbeispiel weist diese Rastverbindung ein Raststück 13 (Figur 2) auf, das von einer Unterseite des Trägers in eine entsprechende Bohrung des Trägers durchgesteckt und in eine korrespondierende Bohrung des Teils 7 einschnappt. Damit wird in einem Montageschritt zum einen der elektrische Anschluss der Antenne 2 an das Funkmodul 1 hergestellt und zum anderen das Funkmodul 1 auf dem Träger 8 mechanisch fixiert. In dieser Montagestellung ist das auf dem Träger 8 befestigte Funkmodul 1 mit nicht näher dargestellten Schaltungen des Kommunikationsgerätes elektrisch verbunden.FIG. 3 shows the state after assembly. The two spring contacts 5 are now under elastic bias on the respectively associated contact surfaces 6 of the radio module 1. The antenna 3 is electrically connected to the radio module 1. The applied spring force ensures that this electrical connection is maintained even with vibrations of the mobile communication device. A gold alloy coating ensures that low contact resistance is maintained over a long service life. The mechanical connection between the radio module fastening device 7 and the carrier 9 is produced by a latching connection 10. In the present embodiment, this latching connection has a latching piece 13 (FIG. 2), which is pushed from an underside of the carrier into a corresponding bore of the carrier and snaps into a corresponding bore of the part 7. Thus, in an assembly step, on the one hand the electrical connection of the antenna 2 to the radio module 1 is established and, on the other hand, the radio module 1 is mechanically fixed on the carrier 8. In this mounting position, the radio module 1 attached to the carrier 8 is electrically connected to circuits of the communication device, not shown in detail.

Durch die Erfindung entfällt also eine aufwändige und Platzbeanspruchende Verkabelung zwischen der Antenne 2 und dem Funkmodul 1. Folglich fällt der bislang erforderliche Einbauraum für das Koaxialkabel und für den Koaxial-Steckverbinder weg. Das erfindungsgemäße mobile Kommunikationsgerät baut kleiner auf und hat ein geringeres Gewicht.The invention thus eliminates a complex and space-consuming wiring between the antenna 2 and the radio module 1. Consequently, the previously required installation space for the coaxial cable and for the coaxial connector is eliminated. The mobile communication device according to the invention builds smaller and has a lower weight.

Die Herstellung der Antennenstruktur 3 in Form einer Schlitzantenne kann als Blech-Biege-Stanzteil mittels eines Folge-Verbund-Werkzeuges in Großserie mit vergleichsweise geringen Herstellungskosten erfolgen.The production of the antenna structure 3 in the form of a slot antenna can be carried out as a sheet metal bending stamped part by means of a series compound tool in mass production with comparatively low production costs.

Insgesamt verringern sich die Montagekosten bei der Herstellung des mobilen Kommunikationsgerätes, da für den Anschluss der Antenne 2 das Koaxial-Kabel weg fällt. In einem Arbeitsvorgang erfolgt sowohl die Montage des Befestigungsmoduls 1 auf dem Träger 8 als auch die elektrische Kontaktierung zwischen Antenne 2 und Funktionsmodul 1. Die Handhabung der filigranen Blech-Schlitzantenne 3 ist einfacher möglich, da die Funkmodul-Befestigungsvorrichtung 7 gleichzeitig als stabiler Träger für die Antenne 2 fungiert. Durch diese Vormontage bilden die Antennenstruktur 3 und die Funkmodul-Befestigungsvorrichtung 7 vorteilhaft eine bauliche Einheit, welche auch den Grad der Automatisierung begünstigt. Es können in verstärktem Ausmaß automatische Handhabungswerkzeuge eingesetzt werden, was insbesondere bei einer Fertigung in großen Stückzahlen von großem Vorteil ist.Overall, the assembly costs are reduced in the production of the mobile communication device, since for the connection of the antenna 2, the coaxial cable falls away. In one operation, both the mounting of the mounting module 1 on the support 8 and the electrical contact between antenna 2 and function module 1. The handling of the filigree sheet-metal slot antenna 3 is easier, since the radio module mounting device 7 at the same time as a stable support for the Antenna 2 acts. As a result of this pre-assembly, the antenna structure 3 and the radio module fastening device 7 advantageously form a structural unit, which also favors the degree of automation. It can be used to a greater extent automatic handling tools, which is particularly in a production in large quantities of great advantage.

Selbstverständlich kann das Befestigungsmittel 10 zwischen der Funkmodul-Befestigungsvorrichtung 7 und dem plattenförmigen Schaltungsträger 8 des Kommunikationsgerätes auch anderes ausgeführt sein, beispielsweise durch eine unlösbare Niet- oder Schnappverbindung oder - wenn das mobile Kommunikationsgerät als so genannte "on-board-unit" in einem KfZ eingesetzt wird, zusätzlich durch eine Schraubverbindung befestigt sein.Of course, the fastening means 10 between the radio module mounting device 7 and the plate-shaped circuit carrier 8 of the communication device be carried out differently, for example, by a non-detachable rivet or snap connection or - if the mobile communication device is used as a so-called "on-board unit" in a motor vehicle, additionally be secured by a screw connection.

Zusammenstellung der verwendeten Bezugszeichen

1
Funkmodul
2
Antenne
3
Antennenstruktur, Schlitzantenne
4
Antennen-Anschlussleitung, Zungenförmige Fortsetzung von 3
5
Federkontakt
6
Kontaktfläche auf 1
7
Funkmodul-Befestigungsvorrichtung
8
Schaltungsträger
9
Befestigungsmittel zwischen 3 und 7, Nietverbindung
10
Befestigungsmittel zwischen 7 und 8, Rastverbindung
11
Pfeil
12
Schlitzgeometrie in 3
13
Raststück
14
Anschlussbereichen der Antennenstruktur 3
15
Ausnehmung in 7 für Federkontaktierung
16
Ausnehmung in 7
Compilation of the reference numbers used
1
radio module
2
antenna
3
Antenna structure, slot antenna
4
Antenna connection cable, tongue-shaped continuation of 3
5
spring contact
6
Contact area on 1
7
Radio module attachment device
8th
circuit support
9
Fasteners between 3 and 7, riveted joint
10
Fasteners between 7 and 8, locking connection
11
arrow
12
Slot geometry in 3
13
locking piece
14
Terminal areas of the antenna structure 3
15
Recess in 7 for spring contact
16
Recess in 7

Claims (10)

Mobiles Kommunikationsgerät, umfassend: - ein Funkmodul (1), - eine an das Funkmodul (1) angeschlossene Antennenstruktur (3), - eine Funkmodul-Befestigungsvorrichtung (7), um das Funkmodul (1) auf einem plattenförmigen Schaltungsträger (8) zu befestigen, dadurch gekennzeichnet, - dass die Antennenstruktur (3) durch Befestigungsmittel (9) mit der Funkmodul-Befestigungsvorrichtung (7) verbunden ist, und - dass in einem Anschlussbereich (14) der Antennenstruktur (3) Federkontakte (5) ausgebildet sind, welche in einem Zustand, in welchem das Funkmodul (1) auf dem Schaltungsträger (8) befestigt ist, eine elektrische Verbindung mit Kontaktflächen (6), die am Funkmodul (1) ausgebildet sind, herstellen. Mobile communication device comprising: a radio module (1), an antenna structure (3) connected to the radio module (1), a radio module fastening device (7) for fastening the radio module (1) to a plate-shaped circuit carrier (8), characterized - That the antenna structure (3) by fastening means (9) with the radio module fixing device (7) is connected, and - that in a connection region (14) of the antenna structure (3) spring contacts (5) are formed, which in a state in which the radio module (1) is mounted on the circuit carrier (8), an electrical connection with contact surfaces (6), which are formed on the radio module (1) produce. Mobiles Kommunikationsgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Federkontakte (5) einstückig mit der Antennenstruktur (3) ausgebildet sind.Mobile communication device according to claim 1, characterized in that the spring contacts (5) are formed integrally with the antenna structure (3). Mobiles Kommunikationsgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Antennenstruktur (3) als eine planare Schlitzantenne ausgebildet ist, dass im Anschlussbereich (14) der Schlitzantenne zwei zungenförmige Fortsetzungen (4) ausgebildet sind und dass die Federkontakte (5) aus diesen zungenförmigen Fortsetzungen (4) geformt sind.Mobile communication device according to claim 1 or 2, characterized in that the antenna structure (3) is designed as a planar slot antenna, that in the connection region (14) of the slot antenna two tongue-shaped continuations (4) are formed and that the spring contacts (5) from these tongue-shaped Continuations (4) are formed. Mobiles Kommunikationsgerät nach Anspruch 3, dadurch gekennzeichnet, dass die Funkmodul-Befestigungsvorrichtung (7) als Kunststoff-Halbschale ausgebildet ist, dass die Antennenstruktur (3) an einer, vom Schaltungsträger (8) abgewandten Außenseite der Kunststoff-Halbschale angeordnet ist und die Federkontakte (5) durch eine Ausnehmung (15) hindurch greifen, um Kontaktflächen (6) des Funkmoduls (1) zu kontaktieren.Mobile communication device according to claim 3, characterized in that the radio module fastening device (7) is designed as a plastic half-shell that the antenna structure (3) on one, from the circuit substrate (8) facing away from the plastic half-shell is arranged and the spring contacts ( 5) pass through a recess (15) to contact contact surfaces (6) of the radio module (1). Mobiles Kommunikationsgerät nach Anspruch 4, dadurch gekennzeichnet, dass jeder Federkontakt (5) jeweils aus einer zum Funkmodul (1) weisenden Abkröpfung der zungenförmigen Fortsetzung (4) gebildet ist.Mobile communication device according to claim 4, characterized in that each spring contact (5) is formed in each case from a to the radio module (1) pointing bend the tongue-shaped continuation (4). Mobiles Kommunikationsgerät nach Anspruch 5, dadurch gekennzeichnet, dass zumindest die zum Funkmodul (1) weisende Abkröpfung der zungenförmigen Fortsetzung (4) mit einer korrosionsbeständigen Beschichtung beschichtet ist.Mobile communication device according to claim 5, characterized in that at least the to the radio module (1) facing bend of the tongue-shaped continuation (4) is coated with a corrosion-resistant coating. Mobiles Kommunikationsgerät nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass die Verbindung zwischen Antennenstruktur (3) und Funkmodul-Befestigungsvorrichtung (7) als unlösbare formschlüssige Verbindung, besonders bevorzugt durch eine Nietverbindung (9) ausgebildet ist.Mobile communication device according to one of claims 3 to 6, characterized in that the connection between the antenna structure (3) and the radio module fastening device (7) is designed as a non-releasable form-locking connection, particularly preferably by a rivet connection (9). Mobiles Kommunikationsgerät nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass die Funkmodul-Befestigungsvorrichtung (7) durch eine Rastverbindung (10) mit dem Schaltungsträger (8) verbindbar ist.Mobile communication device according to one of claims 3 to 7, characterized in that the radio module fastening device (7) by a latching connection (10) with the circuit carrier (8) is connectable. Mobiles Kommunikationsgerät nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass die Schlitzantenne (3) als Blech-Biege-Stanzteil hergestellt ist.Mobile communication device according to one of claims 3 to 8, characterized in that the slot antenna (3) is produced as a sheet metal bending stamped part. Mobiles Kommunikationsgerät nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass das Funkmodul (1) quaderförmig ausgebildet ist, dass die Kontaktflächen (6) an einer vom Schaltungsträger (8) abgewandten Quaderfläche des Funkmoduls (1) angeordnet sind und die Schlitzantenne (3) im Wesentlichen parallel verlaufend zu dieser Quaderfläche angeordnet ist.Mobile communication device according to one of claims 3 to 6, characterized in that the radio module (1) is cuboid, that the contact surfaces (6) on one of the circuit substrate (8) facing away from cuboid surface of the radio module (1) are arranged and the slot antenna (3 ) is arranged substantially parallel to this cuboid surface.
EP07112155A 2006-08-09 2007-07-10 Mobile communications device with integrated slot antenna Not-in-force EP1887650B1 (en)

Applications Claiming Priority (1)

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DE102006037244A DE102006037244B4 (en) 2006-08-09 2006-08-09 Mobile communication device with integrated slot antenna

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AT (1) ATE464672T1 (en)
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US20050017909A1 (en) * 2003-07-25 2005-01-27 Carpenter W. Kevin External modular antennas and wireless terminals incorporating the same
WO2005031914A2 (en) * 2003-09-22 2005-04-07 Centurion Wireless Technologies, Inc. Planar inverted f antenna and method of making the same
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WO2009143863A1 (en) * 2008-05-30 2009-12-03 Gigaset Communications Gmbh Housing antenna arrangement
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ATE464672T1 (en) 2010-04-15
DE102006037244B4 (en) 2008-05-15
DE102006037244A1 (en) 2008-02-28
EP1887650B1 (en) 2010-04-14

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